-- @testpoint: opengauss关键字similar(保留)，作为函数名，合理报错

--关键字不带引号-成功
create function similar(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--清理环境
drop function similar;

--关键字带双引号-成功
create function "similar"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--清理环境
drop function "similar";

--关键字带单引号-合理报错
create function 'similar'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `similar`;
create function `similar`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/